论文标题
量子不和谐和对数负面性在广义的N Qubit Werner状态
Quantum Discord and Logarithmic Negativity in the Generalized n-qubit Werner State
论文作者
论文摘要
量子不一致（QD）是量子系统总量子非本地相关性的度量。量子不和谐的形式主义已应用于各种两量混合状态，据报道，即使状态未进入，也存在非零的量子不和谐。为此，我们计算了高于两个Qubit混合状态的量子不一致，即具有两部分分裂的广义N Qubit Werner状态。我们发现，QD在热力学极限内饱和到具有单位斜率的直线。使用对数消极的两个子系统之间纠缠纠缠的定性研究表明，它们之间的纠缠含量随着导致其饱和的量子的数量而不均匀地增加。我们已经通过分析和数值证明了上述主张。
Quantum Discord (QD) is a measure of the total quantum non-local correlations of a quantum system. The formalism of quantum discord has been applied to various two-qubit mixed states and it has been reported that there is a non-zero quantum discord even when the states are unentangled. To this end, we have calculated the Quantum Discord for higher than two qubit mixed state, that is, the generalized n-qubit Werner state with a bipartite split. We found that the QD saturates to a straight line with unit slope in the thermodynamic limit. Qualitative studies of entanglement between the two subsystems using logarithmic negativity revealed that the entanglement content between them increases non-uniformly with the number of qubits leading to its saturation. We have proved the above claims both analytically and numerically.
